Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-28-2012, 11:23 AM   #15
Rivet Master
 
Moflash's Avatar
 
2007 28' International CCD
Springfield , Missouri
Join Date: Apr 2011
Posts: 1,171
A weight distribution system enables a tow vehicle to more effectively handle the tongue weight of a trailer by removing some of the load from the tow vehicle's rear axle and distributing it to the tow vehicle's front axle and the trailer's axle(s). Note - When the WD system is engaged the actual tongue weight does not change. Recommended tongue weight is from 10% to 15%.
__________________

__________________
Moflash is online now   Reply With Quote
Old 09-28-2012, 11:24 AM   #16
Rivet Master
 
1988 25' Excella
1987 32' Excella
Knoxville , Tennessee
Join Date: Oct 2010
Posts: 2,166
Blog Entries: 1
Looks to me like you are going to be slightly overloaded. And probably do not want to buy a smaller trailer or a larger truck? Might look at the axle ratings and if the the wheels and tires are rated high enough or can be upgraded. Somewhere in there a hitch adds 100 or more lbs. In the US we see it done fairly often. At least I think most 1/2 tons pulling a small fifth wheel or carrying a slide in camper are well overloaded. As I understand it, you have the truck already and are getting the trailer? I think you need to put the hitch on, throw the bars in the back, and go weight the front and rear axles of the truck and figure from there. And Steve is right. The weight added from the trailer will be slightly less than the tongue weight when the WD hitch transfers some to the front axle and the trailer axle.
__________________

__________________
Bill M. is offline   Reply With Quote
Old 09-28-2012, 11:34 AM   #17
Rivet Master
 
Moflash's Avatar
 
2007 28' International CCD
Springfield , Missouri
Join Date: Apr 2011
Posts: 1,171
Steve is right about some transfer but you still do not ( nor does Ford) remove that amount from tongue weight(or payload) calculations.
__________________
Moflash is online now   Reply With Quote
Old 09-28-2012, 11:52 AM   #18
Rivet Master
 
1988 25' Excella
1987 32' Excella
Knoxville , Tennessee
Join Date: Oct 2010
Posts: 2,166
Blog Entries: 1
why not from the payload? If you went to the scale and weighed each truck axle and the trailer axle you would sure be counting any transfer.
__________________
Bill M. is offline   Reply With Quote
Old 09-28-2012, 11:56 AM   #19
Rivet Master
 
Moflash's Avatar
 
2007 28' International CCD
Springfield , Missouri
Join Date: Apr 2011
Posts: 1,171
It is spelled out in towing guide and wd hitch manuals.If you read my above post...........Cant tell you why..... you would have to ask their engineers
__________________
Moflash is online now   Reply With Quote
Old 09-28-2012, 11:58 AM   #20
Rivet Master
 
AldeanFan's Avatar
 
1977 23' Safari
Niagara on the Lake , Ontario
Join Date: Aug 2011
Posts: 654
Images: 3
Quote:
Originally Posted by SteveH View Post
Never said that a pickup is the best tow vehicle. I said, "I would be a lot less concerned with exceeding the max weight on a 1/2 ton pickup than I would be about some of the tow vehicle setups I've seen come out of Canada."

I stand by that statement. I also stand by this statement: "I believe the automotive engineers that design vehicles know lots more about weights and capacities for their vehicles than Can-Am RV does."

So it's ok to overload a pickup but not a van?

How does being from Canada influence this?
__________________
1977 Safari Land Yacht
2005 Toyota Tundra SR5
2010 Ford Flex Ecoboost
AldeanFan is offline   Reply With Quote
Old 09-28-2012, 12:03 PM   #21
Rivet Master
 
Moflash's Avatar
 
2007 28' International CCD
Springfield , Missouri
Join Date: Apr 2011
Posts: 1,171
Read summery at the end.
Spring bar tensioner pulls UP on rear end of bar and DOWN on TT tongue. DOWN force of 2000 lbs on TT tongue adds a load of 300 lbs at TT axles.
This is calculated using ball coupler as the fulcrum: 2000x30/200 = 300.

Now, having added a load of 300 lbs at the TT axles, we must balance the TV/TT teeter totter. Using the TV’s rear axle as the fulcrum, to balance the 300 lbs at the TT’s axles we must add some load at the TV’s front axle.
The lever arm from the rear axle to front axle is 130”. The lever arm from the rear axle to the TT axles is 65+200 = 265”.
The required balancing load at the front axle is 300x265/130 = 611.54 lbs.

Or, we can calculate the reaction at the TV’s rear axle by treating the TV/TT as a lever with the fulcrum at the TV’s front axle.
The lever arm for the 300 lbs at the TT’s axles is 130+65+200 = 395”.
The lever arm for the rear axle is the wheelbase = 130”.
Since the TT axles are “lifting up” with a force of 300 lbs, this translates to an “uplift” at the rear axle equal to 300*395/130 = 911.54 lbs.

Summary of axle load changes:
TV front axle 611.54 lbs ADDED
TV rear axle 911.54 lbs REMOVED
TT axles 300.00 lbs ADDED

Now it is interesting to consider what happens at the hitch.

DOWN force of 2000 lbs on TT tongue adds a load of 1700 lbs at ball coupler.
This is calculated using TT axles as the fulcrum: 2000x170/200 = 1700.

The UP force of 2000 lbs on the rear ends of the spring bars produces an UP force of 2000 lbs at the hitch end of the spring bars.


The UP force of 2000 lbs minus the DOWN force of 1700 lbs on the ball gives a net UP force of 300 lbs at the hitch.

The vertical load on the receiver has been reduced by 300 lbs.
The vertical load transmitted through the ball has been increased by 1700 lbs.

SUMMARY

It is interesting to note that TT weight and “tongue weight” do not enter into these calculations. The WD hitch does not distribute “tongue weight”. It simply removes load from the TV’s rear axle and distributes it to the TV’s front axle and the TT’s axles.
__________________
Moflash is online now   Reply With Quote
Old 09-28-2012, 12:27 PM   #22
Rivet Master
 
SteveH's Avatar
 
2005 39' Land Yacht 390 XL 396
Common Sense , Texas
Join Date: Sep 2007
Posts: 5,311
Quote:
Originally Posted by AldeanFan View Post
So it's ok to overload a pickup but not a van?

How does being from Canada influence this?
You seem to have a great desire to put words in my mouth. Please show me where I said it was OK to overload anything.

Canada seems to be where all of the exceptions to vehicle manufacturer's towing specs come from, and more specifically, Can-Am RV.

Don't think I can put it any plainer, or simpler than that. Any more questions?
__________________
SteveH is offline   Reply With Quote
Old 09-28-2012, 01:10 PM   #23
Rivet Master
 
AldeanFan's Avatar
 
1977 23' Safari
Niagara on the Lake , Ontario
Join Date: Aug 2011
Posts: 654
Images: 3
Quote:
Originally Posted by SteveH View Post
You seem to have a great desire to put words in my mouth. Please show me where I said it was OK to overload anything.

Canada seems to be where all of the exceptions to vehicle manufacturer's towing specs come from, and more specifically, Can-Am RV.

Don't think I can put it any plainer, or simpler than that. Any more questions?

I'm not trying to put words in your mouth,

I don't understand the following comment
"I would be a lot less concerned with exceeding the max weight on a 1/2 ton pickup "

Why would you ever exceed maximums?
unless you had modified the vehicle to increase the maximum ,which can be done with aftermarket and custom parts
__________________
1977 Safari Land Yacht
2005 Toyota Tundra SR5
2010 Ford Flex Ecoboost
AldeanFan is offline   Reply With Quote
Old 09-28-2012, 01:14 PM   #24
2 Rivet Member
 
herrick51's Avatar
 
2012 25' Flying Cloud
gresham , Oregon
Join Date: Sep 2007
Posts: 85
f150

Quote:
Originally Posted by woof View Post
I have a 2010 F150 5.4L with tow package, rated to tow 9600lbs
its a super crew short box, 145" wheel base with a 3.55 axel ratio
the max tongue weight is 1050lbs.

I will have 4 passengers and two large dogs inside weighing in at 750lbs.

I am looking at the 2013 25FB flying cloud which has a tongue weight of 837lbs and max gross weight of 7300lbs.

Does a hitch weight of 837 on the trailer mean you are putting 837lbs on your truck? I have read so many treads and everyone always says to "watch that payload". There is a sticker on the door of the truck that says "the total weight
of passengers and cargo should not exceed 1368lbs".

How does a weight distributing hitch effect the payload number?

I know the truck can pull it, I just need to know if the family can come too?
Hello,
If you do not have the heavy duty tow pkg,your gvwr should be 7200.Check on the door.Your payload is listed at 1540 pds.Max.trailer/9600 pds. gcwr is 15500 conbined truck and trailer. I have the same truck with heavy duty tow pkg.7700gvw/3.73 rear /payload 1960 and a supercab. I've added supersprings/ Mich.erated tires /kn filter and cold air intake system with gibson cat back exhaust system.My hp is now 360 with 425 torque. Not confirmed on dyno. I tow a 2012 FC/FB AND UNDER my gvwr by 250 pds using a Andersen hitch. You will need to travel with empty tanks and be judicious wth weight distribution. That said,I've found the combination works well after 10,000 miles. I travel in the west and encounter mountinous terrain. I wanted a 28 AS but felt I was border line with the 25. If you were buying new ,would recommend a 3/4 ton tow vechicle as you pushing the limits. Anthor point is Ford will try to void your warranty if you have aftermarket cold air system but I managed to convince them that at seventy years old was unlikely my driving habits contributed to computer failure. Good luck
Pete
__________________
herrick51 is offline   Reply With Quote
Old 09-28-2012, 01:15 PM   #25
Rivet Master
 
Currently Looking...
Nowhere , Somewhere
Join Date: Jul 2005
Posts: 6,418
Blog Entries: 2
It is a matter f opinion if these mods are safe or just foolish and dangerous. As we say in Fl, we don' t care how you do it up north, even way up north, just don't take us with you. Jim
__________________
avionstream is offline   Reply With Quote
Old 09-28-2012, 01:26 PM   #26
Rivet Master
 
SteveH's Avatar
 
2005 39' Land Yacht 390 XL 396
Common Sense , Texas
Join Date: Sep 2007
Posts: 5,311
Quote:
Originally Posted by AldeanFan View Post
I'm not trying to put words in your mouth,

I don't understand the following comment
"I would be a lot less concerned with exceeding the max weight on a 1/2 ton pickup "

Why would you ever exceed maximums?
unless you had modified the vehicle to increase the maximum ,which can be done with aftermarket and custom parts
What part of "less concerned" do you not understand?
__________________
SteveH is offline   Reply With Quote
Old 09-28-2012, 01:30 PM   #27
E Pluribus Aluminus
 
Jaxon's Avatar
 
2008 34' Classic S/O
1967 22' Safari
2005 30' Classic
Rockport , Texas
Join Date: Aug 2005
Posts: 1,214
Images: 10
Send a message via AIM to Jaxon Send a message via Yahoo to Jaxon
Woof,
Long and short of it is, if the numbers don’t add up (you being overloaded) and you’re in an accident, no matter if the other guys is at fault, you stand a big chance at being held liable.

Hey Steve and AldeanFan... can we stick to the topic, please? This is about Woof’s concern, not you. How ‘bout taking it outside?
__________________
Bill & Kim
WBCCI 7005 * AIR 9218
The trouble with trouble is it always starts out as fun...
Jaxon is offline   Reply With Quote
Old 09-28-2012, 02:00 PM   #28
Rivet Master
 
Aviator's Avatar

 
1997 34' Limited
1970 27' Overlander
South of Atlanta , Georgia
Join Date: Sep 2009
Posts: 1,655
Images: 2
FWIW, I attended the discussion at Alumapalooza led by the guy from Can-Am in London, Ontario (?). He wasn't as concerned with the published limits due to his discussions with the engineers at the big auto companies in Detroit. What he communicated was that they were rather arbitrary numbers.

As you can see from my signature, I tow a 34' with an F150. The setup is very comfortable to drive, and I am sure that I am near or over my max with the trailer, my wife, two children, dog, and "stuff". I have had the rig through the Dragon's Tail of NC with 12% grades, as well as a just completed trip of the Blue Ridge Parkway. In many respects, I think it out performed my friends F250 diesel setups.
__________________

__________________
Craig and Carol
1997 34' Excella 1000
1970 27' Overlander, International
2009 Ford F150 5.4L
ProPride hitch with 1400# bars

AIR 41028
TAC GA-8
WBCCI 10199
Past President Southeastern Camping Unit (12)
Aviator is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Virginia Campgrounds

Reviews provided by




Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 11:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.